Pneumatic valve.



JOSEPH N. NEWSOM, OF LOUS', MISSOURI, SSGNOR, BY DIRECT AND MESNEASSGNMENTS, T0 NEWSM VALVE COMPANY, OF ST. LOUR, ESSOUR, A. COR-rona'ron ornrssouzar.

To all whom it may concern:

Be it known that JOSEPH N. NEwsoM,

a citizen of the United States, residing at' j and more particularly tothe type of valves utilized in connection with pneumatic tires, theprincipal object of my invention being to provide a comparativelysimple, inexpensive and efficient valve which is constructed so as toreduce to a minmum the tendency of leakage or air between the gasket andthe seat therefor or between the gasket and the stein and disk carryingsame. Q

-Further objects of my invention are to provide a valve having means foraccurately: and positively centering the gasket when the same is-appliedto its seat, further to proide a valve having a gasket the outer portionof which is caused to expand bodily outward or radially when underpressure, and further, to construct the parts of the valve which contactwithbothv flat faces of the gasket with annular ribs arrangedwithrespect to each other so as to bear upon and impinge against thefaces of said' gasket in diderent annular planes with the result thatwhen the gasket is subjected to pressure, portions on each side of thebody thereof will be forcedor compressed in opposite directions radiallywith respect to the stem carrying the gasket, such disposition of thebody of said gasket insuring a perfectly airtight joint between saidgasket and itsseat.

W'ith the foregoing and other objects in view, my invention consists incertain novel features of construction and arrangement of parts,hereinafter more fully described, claimed and illustrated in thevaccompany- 'ing drawings, in which;

Figure 1 is a vertical sectiony taken through the center of a valve `ofmy improved construction. n

Fig. 2 is a side elevational view of the i speciacanon or Lettersraient.

PNEUATIC VALVE Patented Apr. 9, ilil Application led Hatch 17, 191,6.A'Serial No. 84,768.

valve, a portion thereof being in section and with the gasket removedfrom the seat. Fig. 3 is a plan view of the underside of the diskcarried by the lower end of the valve housing. Fig. 4e is a plan View ofthe inner face of the disk which is carried by the valve stem. Referringby numerals to the accompanying drawings, 10 designates the tubular bodyof the valve, with the lower end of which is formed integral a disk 11.Formed in. the underside of this diskrand concentric Ywith the opening12 through the body'of the valve is a circular recess 13, the bottom 14oflwhich is fiat. The lower end of the openingy 12 through the body 10.is reamed out or enlarged to form an annular chamber 15 and formed onthe bottom 14 of the re rounded or dome-shaped as designated by 19..

Formed 'integral with the lower end of the enlarged portion 18 is a disk20, the same being somewhat smaller in diameter than the recess 13 andformed on the inner face of said disk is an annular rib 21 which ispreferably of inverted rV-shape in crosssection, said rib being slightlylarger in diameter than the ribA 16 which is formed on disk v11.

Seated' on top of disk 2O and around the lower portion of member 18 isan elastic gasket 22, preferably of rubber or an elastic composition andrigidly fixed in any suitable manner upon the enlarged portion 18 on topofsaid gasket is a collar 23 yof such size as to have a workingl litwithin chamber 15,

`The` upper end of stem 17 is threaded as designated by 24; so as toreceive a tubular 'nut 25 which "is loosely mounted on the upper end ofthe body 10.

Seated on the threaded upper end of the stein within-tubular member 10is a nut 26 and located on the valve stem below this nut andbearing uponan internal shou1der` pression spring 28.

27 within the body of the valve is a com- When the gasket of mv improved valve is seated and the stem carryin said gasket 1s drawn upwardthrough the ody 10 by manipulation of the nut 25, the upper end ofenlarged member 18 enters the lower end of the passage way 12 throughthe valve body and collar 23 enters and rits snugly within chamber 15,thereby providing centering means for bringing the top of the gasketintovproper position with respect to the seat formed by flatI surface14- in recess 13 and depending rib 16. This centering action insures thereturn ofthe gasket to the same position upon its seat, for after the'gasket has been once seated, the rib 16 will form a shallowgmove in thetop of said gasket', which latter by virtue of the centering action willalways receive said rib 16 when, the gasket is reseated.

When the gasketv is compressed a consid wise, the inner portion ofA thegasket or.

that portion immediately adjacent the member -18 will be squeezed-orcompressed radially inward by the movementf the ribs 16 and 21 towardeach other, thus forming a tight joint and preventing` leakage of airbetween said gasket, the disk 20'the'collar 23` and member 18. By-providing the ribs 16 and 21 on parts which Contact with the elastic orcompressiblegasket, thebody of the latter is squeezed radially in bothdirections when subjected to pressure and by forming one of said ribslarger in diameter than the other, the tendency of the ribs to cutthrough the gasket is minimized.

A valve of my improved construction is comparatively simple, can beeasily and. cheaply manufactured, is especially applicable for pneumatictires and by the peculiar.formation of the valve seat and the. gasketcarrying disk, the leakage of air l through the valve is entirelyeliminated when the gasket is positioned upon said seat and said gasketalways returns to the same position when being reseated. y

Itwill be readilyunderstood that minor changes in the size, form andconstruction of the various parts of my improved valve can be made andsubstituted for those herein shown and described, without departing fromthev spirit of my invention, the scope of which is set forth in theappended claims;

megaca- 1 claim: Y n

1. ln a valve, a tubular `body provided with a. valve seat at one endaround the opening through said body, Aa rib on said valve seat aroundsaid opening, a stem passing through the tubular body, a disk carried bysaid stem and arranged adjacent to the valve seat, a rib on the innerface of said disk, which rib and the rib on thevalve seat areconcentrically arranged and of different diameters, and a compressiblegasket positioned on the disk and adapted to engage upon said valveseat, which gasket overlies and extends radially beyond'both ribs, therib on the disk being normally embedded in the gasket.

2. The herein described lvalve comprising a tubularbody, a disk on thelower end thereof, a depending flange on the edge of the disk, a rib onthe underside of the disk which rib is concentric with the openingthrough the tubular body,a stem ,passing through the tubular body, adisk ,on the lower end of said stem which disk is smaller in` diameterthan the space within the depending lange on the disk of the tubularbody, a rib on top of the disk carried by thestem, which last mentionedrib is larger in diameter than the rib o n the .first-mentioned disk,and a compressible gasket carried by the disk on the stem, a portion ofYwhich gasket. lies outside the rib on the' disk carried by the stem,the rib on the diskbeing normally embedded in said gasket.

3. The combination with a tubular body provided with a valve seat, of avalve stem and disk carried thereby, of concentric ribs formed` on theadjacent faces of the valve body and disk, said ribs being of differentdiameters and a' compressible gasket positioned on the disk, whichgasket is larger in ydiameter than the ribs so as to wholly overlie andproject beyond both of said ribs and the ribon theidisk being normallyeme i bedded in said gasket.

4. In a, valve of the class described, a tubular body provided with avalve seat around the opening through said body, a 1 l valve.stem-positioned in saidbody, a disk carried by said stem and arrangedadjacent to vthe valve seat, a gasket carried by said disk and adaptedto engage on the valvel seat, and means on said seat and on the face ofthe disk to which the gasket is applied for causing the central portionof said gas'- ket to be compressed radially inward and the outer portionthereof to be compressed 'radially outward when the gasket is forcedonto the seat, the means on the face of the disk being normally embeddedin said gasket.

5. The hereindescribed valve comprising a tubular .bodyjprovided with avalve seat around the opening through said body, 'a

stem -passim through the tubular' body,. a disk on sai inner face ofsaid disk, and a gasket' positioned on said disk and adapted tobearagainstthe valve seat, which disk overlies and projects beyond the rib.on the disk, and

said concentriorib being normally embedded in the gasket. f

stem, a concentric rib onthe i In testimony whereof I hereunto aix mysignature in the resenee of two witnesses, 10 thisvlOth day of arch,1916.

JOSEPH N. NEWSOM.

